1. 以前的,往昔的：belying belie的现在分词,掩饰,与-不符,使-失望;证明为假 | erstwhile 以前的,往昔的 | tin 锡

2. 以前：erst 以前 | erstwhile 以前 | erubescence 变红

3. 从前的(以前的,原来的,往昔)：pristine原来的,古时的,原始的 | erstwhile从前的(以前的,原来的,往昔) | intimidationn. 恐吓,威胁

4. 过去的：踏上 embark on | 过去的 erstwhile | 可观的发展 substantial headway

1. 以往的;往昔的
    You use erstwhile to describe someone that used to be the type of person indicated, but no longer is.

    e.g. Erstwhile workers may have become managers...
           过去的工人可能已经成了经理。
    e.g. He fled to America with Phyllis Burton, an erstwhile friend of his wife''s.
           他和他妻子以前的一个朋友菲莉丝·伯顿一起逃往美国。

1. at a previous time

    e.g. at one time he loved her
           her erstwhile writing
           she was a dancer once

    Synonym: onceformerlyat one timeerst